[Buildroot] [PATCH v2] package/uclibc: Enable compile in thumb mode configuration option

[Waldemar Brodkorb <wbx@openadk.org>]

Hi Paul,
Paul Enman wrote,

> Hi All,
> Thanks for your feedback and insight. Buildroot does build a working Cortex-M
> (thumb instructions only) uClibc toolchain by touching up the uClibc(-ng)
> config file with
> 
> Enable COMPILE_IN_THUMB_MODE
> and
> Disable UCLIBC_HAS_CONTEXT_FUNCS
> 
> ARMv5 and thumb1 targets shouldn't be effected by this patch; I'll look into
> guarding packages that depend on (obsolescent?) context control functions and
> prepare an updated version for review.

I think some general symbol like BR2_ARCH_HAS_CONTEXT_FUNCS might be
useful, as other architectures like ARC/Xtensa do have the same
problem here.
 
> The toolchain compiles a bootable kernel and both Linuxthreads and NPTL build
> without error, however I am looking into why flthdr shows busybox bFLT flags
> are set to 0x2 (Has-PIC-GOT).

Is this a problem? What target do you use and did you do some
runtime testing on real hardware?

best regards
 Waldemar